sounds like you are heading in the right direction. Your setup should make that, i think your injectors are right on...better you have to large of an injector than to small, those are good for about 550-600. As for base lining at 300, thats bad, usually you would want to tune first before doing a pull to even make 300...hell ive made like 200 at 15 psi with vtec turned off before because shit is just wierd when nothing is right in the tune at first.